Tire-filler.



No Drawing.

UNITED STATES PATENT OFFICE.

WILLIAM E. GRAVES, OF TOPEKA, KANSAS.

TIRE-FILLER.

Specification of Letters Patent. I

Application filed January 30, 1911. Serial No. 605,587.

Patented July 28, 1914.

To all wkomz't may concern:

Be it known that I, WILLIAM E. GRAVES, a citizen of the United States, residing at T0- peka, in the county of Shawnee and State of Kansas, have invented certain new and useful Improvements in Tire-Fillers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to a composition of matter for use as a filler for automobiles or like tires, and has. for its object to provide a composition for thatpurpose, having the required resiliency for aflording easy travel of a vehicle, which is of light weight, is not affected by changes of temperature, and is of substantial durability.

In the application of my invention, the composition, the constituency and process of compounding which will be hereinafter described, is placed in a suitable casing, which in turn is inclosed within an outer casing like. or similar to the outer casing of an ordinary pneumatic tire, and the finished tire used on a vehicle in the ordinary manner. In order to obviate flattening of the tire under a load, the filler must have sufllcient body to sustain considerable Weight; to prevent the filler from creeping so that the mass will not 3 bunch and form humps or Waves, the filler must have sufiicient flexibility to cause each part to return to its natural position after it has passed its ground contact, as well as an adhesive element that will stick same to its casing; and in order to prevent hardening, the filler must be unaffected by extremes of heat and 'manner, the cork and rubber affording the resilliency usually afiorded by an inner pneumatic tube.

By using cork in the composition, the

weight of the tire is kept down without dea non-conductor of heat or cold, relieves the tire from'the ill effects of extreme weather conditions. 7

By using a flexible glue the cork and rubber particles are held together without causing the core to harden. An example of a flexible glue which may be used as an element in my composition and the process of making same consists of seven pounds of hide glue set about twelve hours, to allow the-glue to soften, and then boiled for two hours;=-to the boiling mixture is added one pound o'fi glycerin, two pounds of castoroil and five pounds of molasses. The complete mixture is then boiled for one hour, being continually stirred While boiling. The chipped rubber which I use in the composition is of medium softness, being preferably of about the kind used for rubber bands or pencil erasers.

Having thus described my invention, what I claim as new therein and desire to secure by Letters-Patent is I A composition of matter for fillin tires consisting of the following materials insubstantially the proportions stated; gviz: ground cork, five pounds, chipped rubber, one-half pound, and flexible glue, the elements of which aggregate two and one-half pounds.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM E. GRAVES. Witnesses: I

MYRTLE N. J AcKsoN, ARTHUR W. CAPS.

,stroying the resiliency, and the cork, being 

